This is the story of the life reborn of Ossona, a hamlet in Val d'Herens in the Valais canton, which was abandoned in the sixties and has now become the pilot project for an agro-tourism site. From 2005 to 2008, we followed the restoration of this site listed as a sustainable development zone, and those involved in the project. Some of them are aged between 14 and 16 years old and were born in Haiti, Morocco and Sion. These youth attend an institution for teenagers in difficulty. Can their minds be transformed by tiring work in the mountains? Once a week, through building and farming work, they completely put themselves into restoring this ghost hamlet. The other participants are between 75 and 90 years old. After having spent their childhood in self-sufficiency here in Ossona they left to discover "modern" life when the dams were being built. As witnesses, they have returned to tell their stories... What can representatives of the valley's old folks and multicultural youth have in common? What do they have to talk about, what can they pass on to each other?